// Dump a pixel sample
void CqMPDump::dump(int x, int y, int idx, const CqVector2D& pos)
{
short id = 2;
TqFloat f;
if (m_outFile==NULL)
{
Aqsis::log() << error << "Attempted to write to unopened mpdump file." << std::endl;
return;
}
size_t len_written = fwrite((void*)&id, sizeof(short), 1, m_outFile);
len_written += fwrite((void*)&x, sizeof(int), 1, m_outFile);
len_written += fwrite((void*)&y, sizeof(int), 1, m_outFile);
len_written += fwrite((void*)&idx, sizeof(int), 1, m_outFile);
f = pos.x();
len_written += fwrite((void*)&f, sizeof(TqFloat), 1, m_outFile);
f = pos.y();
len_written += fwrite((void*)&f, sizeof(TqFloat), 1, m_outFile);
if(len_written != 6)
AQSIS_THROW_XQERROR(XqInvalidFile, EqE_System,
"Error writing mpdump file");
}
// Dump all pixel samples of the current bucket
void CqMPDump::dumpPixelSamples(const CqBucketProcessor& bp)
{
const std::vector<CqImagePixelPtr>& pixels = bp.pixels();
for(std::vector<CqImagePixelPtr>::const_iterator p = pixels.begin(),
e = pixels.end(); p != e; ++p)
{
const CqImagePixel& pixel = **p;
for(int i = 0, numSamples = pixel.numSamples(); i < numSamples; ++i)
{
CqVector2D pos = pixel.SampleData(i).position;
if(!( pos.x() <= bp.SampleRegion().xMin()
|| pos.x() > bp.SampleRegion().xMax()
|| pos.y() <= bp.SampleRegion().yMin()
|| pos.y() > bp.SampleRegion().yMax() ) )
{
// Only dump samples which are inside bp.SampleRegion()
// this means that only samples which are actually computed for
// the current bucket will be considered.
dump(lfloor(pos.x()), lfloor(pos.y()), i, pos);
}
}
}
}
bool CqCurve::Diceable()
{
// OK, here the CqCubicCurveSegment line has two options:
// 1. split into two more lines
// 2. turn into a bilinear patch for rendering
// We don't want to go turning into a patch unless absolutely
// necessary, since patches cost more. We only want to become a patch
// if the current curve is "best handled" as a patch. For now, I'm
// choosing to define that the curve is best handled as a patch under
// one or more of the following two conditions:
// 1. If the maximum width is a significant fraction of the length of
// the line (width greater than 0.75 x length; ignoring normals).
// 2. If the length of the line (ignoring the width; cos' it's
// covered by point 1) is such that it's likely a bilinear
// patch would be diced immediately if we created one (so that
// patches don't have to get split!).
// 3. If the curve crosses the eye plane (m_fDiceable == false).
// find the length of the CqLinearCurveSegment line in raster space
if( m_splitDecision == Split_Undecided )
{
// AGG - 31/07/04
// well, if we follow the above statagy we end up splitting into
// far too many grids (with roughly 1 mpg per grid). so after
// profiling a few scenes, the fastest method seems to be just
// to convert to a patch immediatly.
// we really need a native dice for curves but until that time
// i reckon this is best.
//m_splitDecision = Split_Patch;
CqMatrix matCtoR;
QGetRenderContext() ->matSpaceToSpace(
"camera", "raster",
NULL, NULL,
QGetRenderContextI()->Time(),
matCtoR
);
// control hull
CqVector2D hull[2] = {
vectorCast<CqVector2D>(matCtoR * P()->pValue(0)[0]),
vectorCast<CqVector2D>(matCtoR * P()->pValue(1)[0])
};
CqVector2D lengthVector = hull[ 1 ] - hull[ 0 ];
TqFloat lengthraster = lengthVector.Magnitude();
// find the approximate "length" of a diced patch in raster space
TqFloat gridlength = GetGridLength();
// decide whether to split into more curve segments or a patch
if(( lengthraster < gridlength ) || ( !m_fDiceable ))
{
// split into a patch
m_splitDecision = Split_Patch;
}
else
{
// split into smaller curves
m_splitDecision = Split_Curve;
}
}
return false;
}
bool CqImageBuffer::CullSurface( CqBound& Bound, const boost::shared_ptr<CqSurface>& pSurface )
{
// If the primitive is completely outside of the hither-yon z range, cull it.
if ( Bound.vecMin().z() >= m_optCache.clipFar ||
Bound.vecMax().z() <= m_optCache.clipNear )
return true;
// This needs to be re-enabled when the RiClippingPlane code is wired up.
#if 0
if(QGetRenderContext()->clippingVolume().whereIs(Bound) == CqBound::Side_Outside)
{
return(true);
}
#endif
// If the primitive spans the epsilon plane and the hither plane and can be split,
if ( Bound.vecMin().z() <= FLT_EPSILON )
{
// Mark the primitive as not dicable.
pSurface->ForceUndiceable();
CqString objname( "unnamed" );
const CqString* pattrName = pSurface->pAttributes() ->GetStringAttribute( "identifier", "name" );
if ( pattrName != 0 )
objname = pattrName[ 0 ];
Aqsis::log() << info << "Object \"" << objname.c_str() << "\" spans the epsilon plane" << std::endl;
if ( pSurface->SplitCount() > m_optCache.maxEyeSplits )
{
Aqsis::log() << warning << "Max eyesplits for object \"" << objname.c_str() << "\" exceeded" << std::endl;
return( true );
}
return ( false );
}
TqFloat minz = Bound.vecMin().z();
TqFloat maxz = Bound.vecMax().z();
// Convert the bounds to raster space.
CqMatrix mat;
QGetRenderContext() ->matSpaceToSpace( "camera", "raster", NULL, NULL, QGetRenderContext()->Time(), mat );
Bound.Transform( mat );
// Take into account depth-of-field
if ( QGetRenderContext() ->UsingDepthOfField() )
{
const CqVector2D minZCoc = QGetRenderContext()->GetCircleOfConfusion( minz );
const CqVector2D maxZCoc = QGetRenderContext()->GetCircleOfConfusion( maxz );
TqFloat cocX = max( minZCoc.x(), maxZCoc.x() );
TqFloat cocY = max( minZCoc.y(), maxZCoc.y() );
Bound.vecMin().x( Bound.vecMin().x() - cocX );
Bound.vecMin().y( Bound.vecMin().y() - cocY );
Bound.vecMax().x( Bound.vecMax().x() + cocX );
Bound.vecMax().y( Bound.vecMax().y() + cocY );
}
// And expand to account for filter size.
Bound.vecMin().x( Bound.vecMin().x() - m_optCache.xFiltSize / 2.0f );
Bound.vecMin().y( Bound.vecMin().y() - m_optCache.yFiltSize / 2.0f );
Bound.vecMax().x( Bound.vecMax().x() + m_optCache.xFiltSize / 2.0f );
Bound.vecMax().y( Bound.vecMax().y() + m_optCache.yFiltSize / 2.0f );
// If the bounds are completely outside the viewing frustum, cull the primitive.
if( Bound.vecMin().x() > QGetRenderContext()->cropWindowXMax() ||
Bound.vecMin().y() > QGetRenderContext()->cropWindowYMax() ||
Bound.vecMax().x() < QGetRenderContext()->cropWindowXMin() ||
Bound.vecMax().y() < QGetRenderContext()->cropWindowYMin() )
return ( true );
// Restore Z-Values to camera space.
Bound.vecMin().z( minz );
Bound.vecMax().z( maxz );
// Cache the Bound.
pSurface->CacheRasterBound( Bound );
return ( false );
}
